Clayton is the head of Americans Take Action, a mysterious left-wing activist group that seeks to reform the electoral system. He is also the executive director of Wolf PAC, a progressive political action committee that was founded by Cenk Uygar, the founder of the popular online show, The Young Turks.

Clayton also hammered on Trump over allegations that Russian president Vladimir Putin directed a hacking campaign aimed at helping the Republican win the White House.

“If Putin picked our President, not We the People, then Trump must be rejected by the Electoral College,” Clayton told one news outlet in December.

Clayton also served as campaign manager for Larry Lessig, a Harvard professor who mounted a short-lived run for president last year. Lessig was involved in the charge to oust Trump during the electoral college vote, but he denied to The Daily Caller that he was involved with Clayton’s project.

Clayton was also behind efforts in Oregon and Maine to smear state election candidates he opposed. In Maine, Clayton’s name was on invoices for mailers sent out to female voters falsely smearing a candidate as a “slumlord.” In Oregon, a group linked to Clayton sent fake questionnaires to voters in hopes of hurting a Democratic state senator that Clayton opposed.

Project Veritas, O’Keefe’s group, posted video of Clayton being removed from CPAC after the flag stunt.